Major Traffic Disruption on State Route 60

Traffic Collision on State Route 60 East in Diamond Bar Causes Delays Today

📍 Diamond Bar, CA

📅 Published: September 2, 2025 at 10:01 PM

🔄 Updated: September 2, 2025 at 11:30 PM

Map showing the location of the accident in Diamond Bar, CA
Diamond Bar, September 2, 2025 -

A traffic collision involving two vehicles occurred today on State Route 60 East near North Diamond Bar Boulevard in Diamond Bar, CA. The incident took place around 8:27 PM and involved a red semi truck and a white pickup truck. Both vehicles were blocking slow lanes in a construction zone, leading to significant traffic disruptions.

Emergency services promptly arrived at the scene to manage the situation and control traffic flow. Due to the collision, lane closures and diversions were implemented, resulting in delays for motorists traveling through the area. Traffic was diverted to the Temple off-ramp on the northbound 57 Freeway as crews worked to clear the roadway.

Multiple units were deployed to ensure safety and minimize congestion, but drivers experienced backups as they navigated through the construction zone. The vehicles involved remained on the right shoulder while emergency responders managed the scene.

As the evening progressed, authorities continued to monitor the situation, providing updates to keep motorists informed about the ongoing traffic incident. Drivers are advised to seek alternate routes to avoid delays and congestion in the area.

Stay tuned for further updates on traffic conditions following this incident on State Route 60 East in Diamond Bar, CA.

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